Fix crash when selecting gpodder.net category

Stack trace:

    java.lang.NullPointerException: Attempt to invoke virtual method 'void androidx.appcompat.app.ActionBar.setTitle(java.lang.CharSequence)' on a null object reference
        at de.danoeh.antennapod.fragment.gpodnet.TagFragment.onActivityCreated(TagFragment.java:49)
        at androidx.fragment.app.Fragment.performActivityCreated(Fragment.java:2717)
        at androidx.fragment.app.FragmentStateManager.activityCreated(FragmentStateManager.java:346)
        at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1188)
        at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1356)
        at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1434)
        at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1497)
        at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:447)
        at androidx.fragment.app.FragmentManager.executeOps(FragmentManager.java:2169)
        at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1992)
        at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1947)
        at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1849)
        at androidx.fragment.app.FragmentManager$4.run(FragmentManager.java:413)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7073)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:964)

1 files changed, 4 insertions, 12 deletions

diff --git a/app/src/main/java/de/danoeh/antennapod/fragment/gpodnet/TagFragment.java b/app/src/main/java/de/danoeh/antennapod/fragment/gpodnet/TagFragment.java
index 0ce38656a..b60f1bed2 100644
--- a/app/src/main/java/de/danoeh/antennapod/fragment/gpodnet/TagFragment.java
+++ b/app/src/main/java/de/danoeh/antennapod/fragment/gpodnet/TagFragment.java
@@ -1,17 +1,15 @@
 package de.danoeh.antennapod.fragment.gpodnet;
 
 import android.os.Bundle;
-import androidx.annotation.Nullable;
+
+import org.apache.commons.lang3.Validate;
+
+import java.util.List;
 
 import de.danoeh.antennapod.core.sync.gpoddernet.GpodnetService;
 import de.danoeh.antennapod.core.sync.gpoddernet.GpodnetServiceException;
 import de.danoeh.antennapod.core.sync.gpoddernet.model.GpodnetPodcast;
 import de.danoeh.antennapod.core.sync.gpoddernet.model.GpodnetTag;
-import org.apache.commons.lang3.Validate;
-
-import de.danoeh.antennapod.activity.MainActivity;
-
-import java.util.List;
 
 /**
  * Shows all podcasts from gpodder.net that belong to a specific tag.
@@ -43,12 +41,6 @@ public class TagFragment extends PodcastListFragment {
     }
 
     @Override
-    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
-        super.onActivityCreated(savedInstanceState);
-        ((MainActivity) getActivity()).getSupportActionBar().setTitle(tag.getTitle());
-    }
-
-    @Override
     protected List<GpodnetPodcast> loadPodcastData(GpodnetService service) throws GpodnetServiceException {
         return service.getPodcastsForTag(tag, PODCAST_COUNT);
     }